Pro Tip ..applies anywhere in the Navy -- RTFQ/ATFQ -- Read the , er, Full Question.... Answer the Question.
Pro Knowledge is not rocket science; you either know or you don't, and frankly if you don't, its usually because you didn't try hard enough (ie. not your priority). USNA exists to build Naval and Marine Corps officers, not college graduates, so pro knowledge is a priority. It doesn't go away when you get to the Fleet -- we had NATOPS tests every year, and Threat/RECCEE and Area Operating Procedures tests as part of pre deployment Operational Readiness Exercises (ORE), and the bar for failure was very high. A C average doesn't cut it when lives are at stake.
Like anything else in the Navy, negative attention from above is something to be avoided. I am sure that the Battalion Officer gets a report of any score below a cutoff, and Company Officers set their bar above where the Battalion cutoff to help prioritize and avoid having any Plebe from their Company on the list.